Document 293-1
CCFL Transformers
erating frequencies up to 100 kHz. With output power
from 3.5 to 6.0 Watts, these transformers are ideal for
LCD backlight applications. They are available in two
different gull wing, surface mount packages and one in-
board configuration for height restricted designs.
FL3209 parts have been improved.
The new FL3209-5L and FL3209-6L are electrically
equivalent to the FL3209-1L, FL3209-2L, FL3209-3L
and FL3209-4L, and have an improved physical de-
sign. We will continue to support existing customers
of the superseded parts.
Free evaluation samples are available by contacting
Coilcraft or ordering them on-line at www.coilcraft.com.
The FL Series of transformers is designed for use in cold
cathode fluorescent lamp (CCFL) power supplies at op-
Output Inductance2 Imax
Turns ratio
Vrms3
sec
Vinst max4
pri sec
DCR max (Ohms)
pri sec fb
Part
number1 Schematic Package pri : sec pri : fb (Watts) nom (µH) sec (mA) pri
FL2015-1L_
FL2015-2L_
FL2015-3L_
FL2015-4L_
FL2015-5L_
B
A
A
A
A
1
1
1
1
1
1 : 67
1 : 67
1 : 100 1 : 0.25
1 : 50 1 : 0.14
1 : 125 1 : 0.38
1 : 0.19
1 : 0.19
6.0
6.0
6.0
6.0
6.0
43
43
19
44
20
5.0
5.0
5.0
7.0
7.0
22 1600
23 1600
16 1600
32 1600
12 1600
25.0 2000 0.220 285 0.10
29.0 2000 0.220 285 0.10
20.0 2000 0.190 285 0.10
40.0 2000 0.220 165 0.10
16.0 2000 0.160 330 0.10
FL2015-6L_
FL2015-7L_
FL2015-8L_
FL2015-9L_
FL2015-10L_
B
A
A
A
A
1
1
1
1
1
1 : 67
1 : 67
1 : 86
1 : 100 1 : 0.25
1 : 93
1 : 0.19
1 : 0.19
1 : 0.21
6.0
6.0
6.0
6.0
4.5
48
50
31
22
40
11.0
11.0
11.0
11.0
11.0
23 1600
23 1600
18 1600
16 1600
17 1600
29.0 2000 0.160 176 0.10
29.0 2000 0.160 176 0.10
23.0 2000 0.132 176 0.10
20.0 2000 0.132 176 0.10
21.0 2000 0.175 675 0.50
1 : 0.25
FL3209-5L_
FL3209-6L_
FL2810-1L_
C
D
C
5
5
4
1 : 100
1 : 93
1 : 100
—
1 : 0.17
—
3.5
3.5
4.5
48
40
35
5.0
5.0
7.0
16 1600
17 1600
15 1500
20.0 2000 0.350 362
21.0 2000 0.400 800 0.08
16.5 1650 0.220 500
—
—
1. When ordering, please specify a packaging code:
FL2810-1LD
Isolation (tested for one minute)
Part
number
Primary to
secondary
Primary to
feedback
All windings
to core
Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic
FL2015
FL3209
FL2810
1500 Vrms
500 Vrms
1500 Vrms
500 Vrms
500 Vrms
—
1500 Vrms
1500 Vrms
1500 Vrms
tape.
Package 1: 400 parts per full reel.
Package 4: 750 parts per full reel.
Package 5: 1000 parts per full reel.
Note: For Schematic B, primary is connected to secondary at
pin 3. The primary is not isolated from the secondary.
B = Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge),
use code letter D instead.
2. Inductance is measured across both halves of the primary.
3. Vrms = continuous voltage.
4. Vinst = instantaneous voltage at startup.
5. Ambient operating temperature range −40°C to +85°C.
6. Electrical specifications at 25°C.
Schematics
A
B
D
C
1
1
3
2
3
8
6
3
6
7
2
3
4
Primary
Primary
Primary
3
Secondary
Secondary
Primary
Secondary
Secondary
5
2
5
2
4
1
Feedback
Feedback
Feedback
9
9
7
5
4
4
For Royer
topology
For Royer
topology
For flyback
topology
For Royer
topology
Specifications subject to change without notice.
Please check our website for latest information. Document 293-1 Revised 02/10/09
© Coilcraft, Inc. 2009